<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 同时区域 -->
            <el-alert
            title="添加商品信息"
            type="info"
            center
            :closable="false"
            show-icon>
          </el-alert>
          <!-- 步骤条 -->
          <el-steps :space="200" :active="active - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
          </el-steps>

          <!-- tab栏区域 -->
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top" >
          <el-tabs v-model="active" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked"	>
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop="goods_name" >
                    <el-input v-model="addForm.goods_name" ></el-input>
                </el-form-item>
                <el-form-item label="商品价格" prop="goods_price">
                    <el-input v-model="addForm.goods_price" type="number" ></el-input>
                </el-form-item>
                <el-form-item label="商品重量" prop="goods_weight">
                    <el-input v-model="addForm.goods_weight" type="number" ></el-input>
                </el-form-item>
                <el-form-item label="商品数量" prop="goods_number">
                    <el-input v-model="addForm.goods_number" type="number" ></el-input>
                </el-form-item>
                <el-form-item label="商品分类" prop="goods_cat">
                    <el-cascader
                    expand-trigger="hover"
                    :options="cateList"
                    :props="cateProps"
                    v-model="addForm.goods_cat"
                    @change="handleChange">
                  </el-cascader>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
                <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id" >
                    <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox border :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"></el-checkbox>
                      </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headerObj"
                    :on-success="handleSuccess"
                    >
                <el-button size="small" type="primary">点击上传</el-button>
                </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                <el-button type="primary" class="btnAdd" @click="add" >添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
          </el-form>

        </el-card>

        <!-- 图片预览 -->
        <el-dialog
            title="图片预览"
            :visible.sync="previewVisible"
            width="50%">
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'

export default {
    data() {
        return {
            active: '0',
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat: [],
                pics: [],
                goods_introduce: '',
                attrs: []
            },
            addFormRules: {
                goods_name: [
                { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price: [
                { required: true, message: '请输入商品价格', trigger: 'blur' }
                ],
                goods_weight: [
                { required: true, message: '请输入商品重量', trigger: 'blur' }
                ],
                goods_number: [
                { required: true, message: '请输入商品数量', trigger: 'blur' }
                ],
                goods_cat: [
                { required: true, message: '请选择商品分类', trigger: 'blur' }
                ]
            },
            cateList: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList(){
            const {data: res} = await this.$http.get('categories')
            if (res.meta.status !== 200) return this.$message.error('请求商品分类数据失败')
            this.cateList= res.data

        },
        handleChange(){
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat= []
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        async tabClicked(){
            if ( this.active === '1' ) {
                const {data: res} = await this.$http.get(`categories/${this.catId}/attributes`,{ params: {sel: 'many'} })
                if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败')
 
                res.data.forEach(item =>{
                    item.attr_vals = item.attr_vals.length === 0? [] : item.attr_vals.split(' ')
                })
                this.manyTableData =res.data 
            }else if ( this.active === '2') {
                const {data: res} = await this.$http.get(`categories/${this.catId}/attributes`,{ params: {sel: 'only'} })
                if (res.meta.status !== 200) return this.$message.error('获取静态参数列表失败')
                this.onlyTableData= res.data
                console.log(this.onlyTableData)
            }
        },
        handlePreview(file){
            this.previewPath = file.response.data.url
            
            this.previewVisible= true

        },
        handleRemove(file){
            const filePath =file.response.data.tmp_path
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            this.addForm.pics.splice(i, 1)
        },
        handleSuccess(response){
            const picInfo = {pic: response.data.tmp_path}
            this.addForm.pics.push(picInfo)
        },
        add(){
            this.$refs.addFormRef.validate(async valid =>{
                if (!valid) return this.$message.error('请填写必要的表单项！')
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                this.manyTableData.forEach(item =>{
                    const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item =>{
                    const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                console.log(form)

                const {data: res} = await this.$http.post('goods',form)
                if (res.meta.status !== 201) return this.$message.error('添加商品失败')
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            } )
        }
    },
    computed: {
     catId(){
         if (this.addForm.goods_cat.length === 3) {
             return this.addForm.goods_cat[2]
         }
         return null
     }   
    }
}
</script>

<style lang="less" scoped >

.previewImg{
    width: 100%;
}

.btnAdd{
    margin-top: 15px ;
}
</style>
